"""
研究服务

提供研究相关的核心功能，包括：
- 项目管理
- 文献分析
- 数据分析
- 报告生成
"""
import json
import uuid
from typing import Dict, List, Any, Optional
from datetime import datetime
import logging

# 配置日志
logging.basicConfig(level=logging.INFO)
research_logger = logging.getLogger('research_service')


class ResearchService:
    """研究服务类"""
    
    def __init__(self):
        # 模拟数据存储
        self.projects = {}
        self.literature_data = {}
        self.analysis_results = {}
        self.reports = {}
    
    def create_project(self, user_id: str, project_data: Dict[str, Any]) -> Dict[str, Any]:
        """创建研究项目"""
        try:
            project_id = str(uuid.uuid4())
            
            project = {
                'project_id': project_id,
                'user_id': user_id,
                'title': project_data.get('title', ''),
                'description': project_data.get('description', ''),
                'research_area': project_data.get('research_area', ''),
                'methodology': project_data.get('methodology', ''),
                'timeline': project_data.get('timeline', ''),
                'status': 'active',
                'created_at': datetime.now().isoformat(),
                'updated_at': datetime.now().isoformat(),
                'is_collaborative': project_data.get('is_collaborative', False)
            }
            
            self.projects[project_id] = project
            
            research_logger.info(f"项目创建成功: {project_id}")
            
            return {
                'success': True,
                'project_id': project_id,
                'message': '项目创建成功'
            }
            
        except Exception as e:
            research_logger.error(f"项目创建失败: {str(e)}")
            return {
                'success': False,
                'error': str(e)
            }
    
    def analyze_literature(self, project_id: str, literature_data: Dict[str, Any]) -> Dict[str, Any]:
        """文献分析"""
        try:
            if project_id not in self.projects:
                return {'success': False, 'error': '项目不存在'}
            
            analysis_id = str(uuid.uuid4())
            
            # 模拟文献分析结果
            analysis_result = {
                'analysis_id': analysis_id,
                'project_id': project_id,
                'keywords': literature_data.get('keywords', []),
                'databases': literature_data.get('databases', []),
                'date_range': literature_data.get('date_range', {}),
                'papers_found': 150,  # 模拟找到的论文数量
                'relevant_papers': 75,  # 模拟相关论文数量
                'analysis_summary': '文献分析已完成，发现了相关的研究趋势和空白',
                'created_at': datetime.now().isoformat()
            }
            
            self.literature_data[analysis_id] = analysis_result
            
            research_logger.info(f"文献分析完成: {analysis_id}")
            
            return {
                'success': True,
                'analysis_id': analysis_id,
                'result': analysis_result
            }
            
        except Exception as e:
            research_logger.error(f"文献分析失败: {str(e)}")
            return {
                'success': False,
                'error': str(e)
            }
    
    def search_literature(self, project_id: str, search_params: Dict[str, Any]) -> Dict[str, Any]:
        """文献搜索"""
        try:
            if project_id not in self.projects:
                return {'success': False, 'error': '项目不存在'}
            
            search_id = str(uuid.uuid4())
            
            # 模拟搜索结果
            search_result = {
                'search_id': search_id,
                'project_id': project_id,
                'keywords': search_params.get('keywords', []),
                'databases': search_params.get('databases', []),
                'results_count': 200,  # 模拟搜索结果数量
                'papers': [
                    {
                        'id': f'paper_{i}',
                        'title': f'研究论文标题 {i}',
                        'authors': ['作者A', '作者B'],
                        'year': 2023,
                        'relevance_score': 0.85
                    }
                    for i in range(10)  # 返回前10个结果
                ],
                'search_time': datetime.now().isoformat()
            }
            
            research_logger.info(f"文献搜索完成: {search_id}")
            
            return {
                'success': True,
                'search_id': search_id,
                'results': search_result
            }
            
        except Exception as e:
            research_logger.error(f"文献搜索失败: {str(e)}")
            return {
                'success': False,
                'error': str(e)
            }
    
    def perform_data_analysis(self, project_id: str, analysis_data: Dict[str, Any]) -> Dict[str, Any]:
        """执行数据分析"""
        try:
            if project_id not in self.projects:
                return {'success': False, 'error': '项目不存在'}
            
            analysis_id = str(uuid.uuid4())
            
            # 模拟数据分析结果
            analysis_result = {
                'analysis_id': analysis_id,
                'project_id': project_id,
                'data_source': analysis_data.get('data_source', ''),
                'analysis_type': analysis_data.get('analysis_type', ''),
                'parameters': analysis_data.get('parameters', {}),
                'results': {
                    'statistical_summary': {
                        'mean': 75.5,
                        'std_dev': 12.3,
                        'sample_size': 100
                    },
                    'correlations': [
                        {'variables': ['A', 'B'], 'correlation': 0.75, 'p_value': 0.001}
                    ],
                    'insights': [
                        '发现了显著的正相关关系',
                        '数据分布符合正态分布',
                        '结果具有统计学意义'
                    ]
                },
                'visualizations': [
                    {'type': 'histogram', 'data': 'histogram_data.png'},
                    {'type': 'scatter_plot', 'data': 'scatter_plot.png'}
                ],
                'completed_at': datetime.now().isoformat()
            }
            
            self.analysis_results[analysis_id] = analysis_result
            
            research_logger.info(f"数据分析完成: {analysis_id}")
            
            return {
                'success': True,
                'analysis_id': analysis_id,
                'results': analysis_result
            }
            
        except Exception as e:
            research_logger.error(f"数据分析失败: {str(e)}")
            return {
                'success': False,
                'error': str(e)
            }
    
    def generate_report(self, project_id: str, report_config: Dict[str, Any]) -> Dict[str, Any]:
        """生成研究报告"""
        try:
            if project_id not in self.projects:
                return {'success': False, 'error': '项目不存在'}
            
            report_id = str(uuid.uuid4())
            
            # 模拟报告生成
            report = {
                'report_id': report_id,
                'project_id': project_id,
                'format': report_config.get('format', 'academic_paper'),
                'sections': report_config.get('sections', []),
                'citation_style': report_config.get('citation_style', 'APA'),
                'content': {
                    'abstract': '本研究探讨了...',
                    'introduction': '研究背景和目的...',
                    'methodology': '采用的研究方法...',
                    'results': '研究结果显示...',
                    'conclusion': '研究结论和建议...'
                },
                'metadata': {
                    'word_count': 5000,
                    'page_count': 20,
                    'references_count': 50
                },
                'generated_at': datetime.now().isoformat()
            }
            
            self.reports[report_id] = report
            
            research_logger.info(f"研究报告生成完成: {report_id}")
            
            return {
                'success': True,
                'report_id': report_id,
                'report': report
            }
            
        except Exception as e:
            research_logger.error(f"报告生成失败: {str(e)}")
            return {
                'success': False,
                'error': str(e)
            }
    
    def store_research_data(self, user_id: str, data_id: str, data: Dict[str, Any]) -> Dict[str, Any]:
        """存储研究数据"""
        try:
            # 模拟数据存储
            storage_result = {
                'data_id': data_id,
                'user_id': user_id,
                'stored_at': datetime.now().isoformat(),
                'size': len(json.dumps(data)),
                'checksum': hash(json.dumps(data, sort_keys=True))
            }
            
            research_logger.info(f"研究数据存储成功: {data_id}")
            
            return {
                'success': True,
                'storage_info': storage_result
            }
            
        except Exception as e:
            research_logger.error(f"研究数据存储失败: {str(e)}")
            return {
                'success': False,
                'error': str(e)
            }
    
    def get_project(self, project_id: str) -> Dict[str, Any]:
        """获取项目信息"""
        try:
            if project_id not in self.projects:
                return {'success': False, 'error': '项目不存在'}
            
            project = self.projects[project_id]
            
            return {
                'success': True,
                'project': project
            }
            
        except Exception as e:
            research_logger.error(f"获取项目失败: {str(e)}")
            return {
                'success': False,
                'error': str(e)
            }
    
    def update_project(self, project_id: str, update_data: Dict[str, Any]) -> Dict[str, Any]:
        """更新项目"""
        try:
            if project_id not in self.projects:
                return {'success': False, 'error': '项目不存在'}
            
            project = self.projects[project_id]
            
            # 更新项目数据
            for key, value in update_data.items():
                if key in project:
                    project[key] = value
            
            project['updated_at'] = datetime.now().isoformat()
            
            research_logger.info(f"项目更新成功: {project_id}")
            
            return {
                'success': True,
                'project': project
            }
            
        except Exception as e:
            research_logger.error(f"项目更新失败: {str(e)}")
            return {
                'success': False,
                'error': str(e)
            }
    
    def delete_project(self, project_id: str) -> Dict[str, Any]:
        """删除项目"""
        try:
            if project_id not in self.projects:
                return {'success': False, 'error': '项目不存在'}
            
            del self.projects[project_id]
            
            research_logger.info(f"项目删除成功: {project_id}")
            
            return {
                'success': True,
                'message': '项目删除成功'
            }
            
        except Exception as e:
            research_logger.error(f"项目删除失败: {str(e)}")
            return {
                'success': False,
                'error': str(e)
            }
    
    def list_projects(self, user_id: str) -> Dict[str, Any]:
        """列出用户的项目"""
        try:
            user_projects = [
                project for project in self.projects.values()
                if project['user_id'] == user_id
            ]
            
            return {
                'success': True,
                'projects': user_projects,
                'count': len(user_projects)
            }
            
        except Exception as e:
            research_logger.error(f"获取项目列表失败: {str(e)}")
            return {
                'success': False,
                'error': str(e)
            }
    
    def get_service_status(self) -> Dict[str, Any]:
        """获取服务状态"""
        return {
            'service_name': 'ResearchService',
            'status': 'running',
            'projects_count': len(self.projects),
            'literature_analyses_count': len(self.literature_data),
            'data_analyses_count': len(self.analysis_results),
            'reports_count': len(self.reports),
            'last_activity': datetime.now().isoformat()
        }